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2022 Fiscal Year Final Research Report

A molecular framework for polar localization of nutrient transport proteins in the plasma membrane of plant cells

Research Project

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Project/Area Number 19H00934
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 38:Agricultural chemistry and related fields
Research InstitutionOsaka Metropolitan University (2022)
Osaka Prefecture University (2019-2021)

Principal Investigator

Takano Junpei  大阪公立大学, 大学院農学研究科, 教授 (70532472)

Co-Investigator(Kenkyū-buntansha) 高須賀 太一  北海道大学, 農学研究院, 准教授 (70748409)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords輸送体 / 細胞内局在 / 小胞輸送 / 極性
Outline of Final Research Achievements

The aim of study was understanding of the mechanisms underlying the polar localization of nutrient transporters in plant cells. We have previously shown that continuous endocytosis and exocytosis are required for the maintenance of the polar localization of a boric acid channel NIP5;1 and a borate exporter BOR1 toward the soil- and stele-side plasma membrane domains, respectively, in root cells. In this study, we further investigated the mechanisms utilizing genetics and proteomics approaches. As a major finding, we identified the importance of both phosphorylation and dephosphorylation of BOR1 C-terminal region in the regulation of the polar trafficking.

Free Research Field

植物栄養学

Academic Significance and Societal Importance of the Research Achievements

本研究ではホウ酸チャネルNIP5;1とトランスポーターBOR1をモデルとし植物の膜タンパク質の土壌/中心側細胞膜への偏在メカニズムの一端を明らかにした。これは植物細胞における栄養輸送と膜交通の理解を進めるだけでなく細胞極性の形成という発生学の根本に迫るものである。本研究ではまた、多様な輸送体の偏在性を人為的に制御する技術の開発を目指した。いまだ開発途上であるが、輸送体の局在改変技術は、植物のみならず微生物等様々な生物由来の輸送体を植物の生産性、機能性向上のために活用する基盤技術となるものと期待される。

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Published: 2024-01-30  

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